Boosted powerglide guys and engine temps
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
Boosted powerglide guys and engine temps
This goes out to guys with built, boost n glide. How does your temps go on the highway so 15-30 mins runs just cruising? Maiden voyage mine got 225 so I shut here down.
Last edited by croatbob; Feb 9, 2017 at 12:38 PM.
Safety Car
Joined: May 2011
Posts: 3,807
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From: Oshawa, Ontario
Le Mans Master
Joined: Jan 2009
Posts: 5,423
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From: Daytona Beach/ Atlanta---- Good Ol' Florida Boy/ Georgia
Those temps are way too high for that rpm even in 82* weather. Might want to try a separate Trans cooler. I found that wrapping the exhaust back passed the transmission helps with stopping transfer of heat to the transmission and ultimately to the radiator. I'm up here in atl and so it's been cool lately and on my zr1 turning the blower very aggressively and having a 2011 so it has the aggressive Trans ratio I only see 180 coolant and 180 oil. Make sure around your radiator is fully sealed. Also if you have something like the D3 fans they are great for low speeds but heavy shrouding will choke the radiator at highway speeds.
Team Owner
Joined: Nov 2007
Posts: 24,035
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From: Gilbert AZ
No reason? You now have a tranny cooler adding heat to system/blocking airflow. You have a torque converter at low RPM turning wasted energy directly into heat. You now are spinning 2600rpm instead of 1200rpm. That means a LOT more heat.
So saying no reason is a bit of a stretch. Race car parts=race car problems.
So saying no reason is a bit of a stretch. Race car parts=race car problems.
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Melting Slicks
Joined: Mar 2005
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From: Okinawa
Burning Brakes
Joined: Nov 2008
Posts: 908
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From: Lower RGV
St. Jude Donor '10-'11-'12
I've had a Glide, ERL 427, Ysi for almost 3 years now (in Texas). 225* after about 15-30 mins on the highway in 82* weather is normal by my experience. I have blasted it at that temp many times with no problem. Under 235*or so I have gone WOT without concern and no problems. I also have a vented hood (original LG version).
With the vented hood, temps drop much quicker than stock hood.
With the vented hood, temps drop much quicker than stock hood.
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
No reason? You now have a tranny cooler adding heat to system/blocking airflow. You have a torque converter at low RPM turning wasted energy directly into heat. You now are spinning 2600rpm instead of 1200rpm. That means a LOT more heat.
So saying no reason is a bit of a stretch. Race car parts=race car problems.
So saying no reason is a bit of a stretch. Race car parts=race car problems.
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
Other cars are other cars. Just for fun I just drove home in 6th gear for lunch. Rock solid 176F. Drove back to work 12 miles in 4th gear, ~2700-3000rpm and 210+ by the time I got to parking lot. So saying more than double the RPM, generating 2x or more the heat doesn't effect cooling is a bit of a stretch. When did you ever put it in 4th gear and just cruise on the highway for 10+ minutes with a 6 speed to compare?
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
Other cars are other cars. Just for fun I just drove home in 6th gear for lunch. Rock solid 176F. Drove back to work 12 miles in 4th gear, ~2700-3000rpm and 210+ by the time I got to parking lot. So saying more than double the RPM, generating 2x or more the heat doesn't effect cooling is a bit of a stretch. When did you ever put it in 4th gear and just cruise on the highway for 10+ minutes with a 6 speed to compare?
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
225 isn't overheating. Not even close.
Thousands of powerglide and th400 c6 vettes? You can probably count them on one hand, and out of those ones that see street use are probably even less.
Thousands of powerglide and th400 c6 vettes? You can probably count them on one hand, and out of those ones that see street use are probably even less.
Last edited by Unreal; Feb 10, 2017 at 08:35 PM.
Melting Slicks
Joined: Feb 2013
Posts: 2,034
Likes: 111
I'm virtually certain if I cruised around with my LSX block procharged setup at 2600rpm+ on the freeway at only 55mph in 80*+ temps that my car would be at 225*, and that is with normal cruising temps with 6 speed at maybe 180* on average. That is with dewitts radiator, dewitts single brushless fan, vented hood but no oil cooler.
I don't think 225* coolant temps is all that bad though, maybe not ideal but certainly not something I'd be super concerned with, I think I'd watch the oil temps more.
notching the front bumper frame rail and fab'ing sheet metal plates for the side Pat G style made a good difference in helping cooling for me if you haven't done that yet.
Maybe time for you to add a bigger oil cooler?
I don't think 225* coolant temps is all that bad though, maybe not ideal but certainly not something I'd be super concerned with, I think I'd watch the oil temps more.
notching the front bumper frame rail and fab'ing sheet metal plates for the side Pat G style made a good difference in helping cooling for me if you haven't done that yet.
Maybe time for you to add a bigger oil cooler?
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
this is what I expected and wanted info from someone who actuality has a similar combo not pocket scientists. The handful of ppl I have asked that do gave a glide n lsx aren't having this problem which is good cause that means fhere is a solution and once sorted I will be able to do short highway runs to Mexico lol
Burning Brakes
Joined: Nov 2008
Posts: 908
Likes: 66
From: Lower RGV
St. Jude Donor '10-'11-'12
this is what I expected and wanted info from someone who actuality has a similar combo not pocket scientists. The handful of ppl I have asked that do gave a glide n lsx aren't having this problem which is good cause that means fhere is a solution and once sorted I will be able to do short highway runs to Mexico lol
I bought a '08 Z06 and did H/C/I on it for "any time" weather- a fun car but not anything like a PG, 427, Ysi combo.
Drifting
Joined: Sep 2009
Posts: 1,330
Likes: 61
From: Nantucket MA
Although not a glide/TH400 car, here's my info to compare. See my sig for the combo.
On Drag Week this year with a fully loaded car (driver/passenger +luggage) AND towing a trailer that when loaded weighs 350lbs + my car never saw over 200 degrees on the highway in 90 degree heat. That's doing 80mph with the RPM's at 2300. That's also being completely heat soaked on a 300 mile drive...
At night when the ambient temp dropped into the high 70's the car ran at 174 degrees while on the highway and 190 on the back roads with stop and go traffic.
One thing I did change this year was to add the ZL1 vent to the hood. Based on comparable info from last year it dropped the coolant temp by a full 10 degrees at cruise. I was pretty impressed with that $150 investment.
- Travis
On Drag Week this year with a fully loaded car (driver/passenger +luggage) AND towing a trailer that when loaded weighs 350lbs + my car never saw over 200 degrees on the highway in 90 degree heat. That's doing 80mph with the RPM's at 2300. That's also being completely heat soaked on a 300 mile drive...
At night when the ambient temp dropped into the high 70's the car ran at 174 degrees while on the highway and 190 on the back roads with stop and go traffic.
One thing I did change this year was to add the ZL1 vent to the hood. Based on comparable info from last year it dropped the coolant temp by a full 10 degrees at cruise. I was pretty impressed with that $150 investment.
- Travis